's marathon weekend in new york city. that got me thinking that 26.2 miles, that's a long way,butdanielliebermanwho is a harvard professor of evolution said human beings are actually made for this. we're the endurance champions of the animal world. he's got a new book it's called "the story of the human body." and he said anyone can learn to run faster with less effort. ♪ >> the question really was how did people hunt before the invention of technology such as the bow and arrow which was only about 100,000 years ago. we think our ancestors evolved to run that animals galloped in the heat and therefore they can run them into heat stroke and kill them. this is a treadmill that has got a force plate built into it. it's, like, a fancy scale that measures forces in every dimension. each one of these markers is just reflecting light that hits it and then bounces back to a camera and it's just telling us where the joints are. it's basically put together a picture of his body. so, beau is running in a way a lot of americans run. he's running with a typical running form. he's running with a